Service Functions - Mitsubishi Electric MSZ-LN-VG Series Service Manual

SERVICE FUNCTIONS

11
MXZ-2F33VF MXZ-2F42VF
MXZ-2F33VF2 MXZ-2F42VF2 MXZ-2F53VF2 MXZ-2F53VFH2
MXZ-2F33VF3 MXZ-2F42VF3 MXZ-2F53VF3 MXZ-2F53VFH3
MXZ-3F54VF MXZ-3F68VF
MXZ-3F54VF2 MXZ-3F68VF2 MXZ-4F72VF2 MXZ-4F80VF2
MXZ-3F54VF3 MXZ-3F68VF3 MXZ-4F72VF3 MXZ-4F80VF3
11-1. THE POSITION OF SWITCH
<MXZ-2F33VF/2F42VF/2F53VF/2F53VFH, MXZ-2F33VF2/2F42VF2/2F53VF2/2F53VFH2,
MXZ-2F33VF3/2F42VF3/2F53VF3/2F53VFH3>
SW1
ON
Outdoor display P.C. board
<MXZ-3F54VF/3F68VF/4F72VF, MXZ-3F54VF2/3F68VF2/4F72VF2/4F80VF2,
MXZ-3F54VF3/3F68VF3/4F72VF3/4F80VF3>
CN750
CN751
Outdoor control
P.C. board
11-2. LOCKING THE OPERATION MODE OF THE AIR CONDITIONER (COOL, DRY, HEAT)
With this function, once the operation mode is locked to either COOL/DRY mode or HEAT mode, the air conditioner
operates in that mode only.
Changing the setting is required to activate this function. Explain about this function to your customers and ask them
whether they want to use it.
[How to lock the operation mode]
(1) Turn OFF the power supply and make sure that the LED goes off.
(2) Set SW1 as shown in the figure below.
(3) Turn ON the power supply.
<MXZ-2F33VF/2F42VF/2F53VF/2F53VFH
MXZ-2F33VF2/2F42VF2/2F53VF2/2F53VFH2
MXZ-2F33VF3/2F42VF3/2F53VF3/2F53VFH3>
SW1 on the outdoor display P.C. board
Cool/Dry Heat
SW1 SW1
ON
OBH790D
MXZ-2F53VF
MXZ-4F72VF
SW2
ON
1 2 3 4 5 6
SW871
SW1
ON
1 2 3 4 5 6
SW2
ON
1 2 3 4 5 6
ON
MXZ-2F53VFH
<MXZ-3F54VF/3F68VF/4F72VF
MXZ-3F54VF2/3F68VF2/4F72VF2/4F80VF2
MXZ-3F54VF3/3F68VF3/4F72VF3/4F80VF3>
SW1 on the outdoor control P.C. board
Cool/Dry
SW1
ON
5 6
92
Heat
SW1
ON
5 6